Pneumatic tool.



H. E. LE GENDRE & G. LEIGH.

PNEUMATIC TOOL.

APRLIOATION IILBD D3011, 1911.

Patented July 1, 1913.

WITNESSES: @wrffime/ rww/w nmrrnn STATES PATENT OFFICE.

HENRY E. LE GENDRE, OF CRESSKILL, NEW

"JERSEY, AND GEORGE LEIGH, OF NEW YORK, N. Y., ASSIGNORS T0 E. W. BLISSCOMPANY, OF BII'OOKLYN, NEW YORK, A

--CORPORATION OF VIRGINIA.

PNEUMATIC r'ooL.

Original application ifiled November 3, 1910, Serial December 11, 1911.

To all whom it mag concern: Be it known that we, HEN-RY Er Ln ,iiENDREand GEORGE LrnoH, citizens of the and useful Improvements in Pneumaticlools, of which the following 1s a speclfica- 'tion.

This invention relates to a" closure or locking-means for the ends ofthe casings of pneumatic tools, and aims'to provide oer:

tain improvements therein.

It further relates to Improvements 111 the general structure of suchtools at the inlet end.

Pneumatic tools are ordinarily subjected to a great amount and degree ofvibration and it has been difficult to obtain a means for closing theend of the tool casin which will not be loosened under such vi nation.The present invention is designed to overcome the foregoing objection,and provides a closure which may not only be malntained fixed in thecasing under vibration, but upon which the force of vibration acts toincrease its fixity. The closure also acts as a means for holdingsecurely in place certain parts of the tool at the inlet end.

The present application is a division of our earlier application S. No.590,493, filed November 3, 1910.

An embodiment of the invention is described in detail in connection withthe accompanying drawings, wherein- Figure 1 is a vertical sectionalview of the end portion of a pneumatiotool, showing the end-closure inplace. Fig. 2 1s a view in elevation of a part of the end 2110- partlyin elevation another part of the the part shown in 4 a vertical-secandpartly in section of end closure, fittedupon the preceding view. Fig.

- tional view of the valve-box, to show more the construction thereof.

clearl y A indicates a casing In the drawings,

-having .a piston cylinder A therein and Specification of LettersPatent.

Patented July 1, 1913.

No. 590,493. Dlvideitandthis application filed Serial No. 665,164'.'

which may also have a cylindrical chamber A therein in which avalve boxor the like C may be contained. The valve box C has a valve-proper ctherein and may be closed by a cap 0 fitting within a recess 0 on the nBer face of the valve-box.

and E indicate respectively, parts of the end-closing means,'D a plug orcap for closing the end of the casing and E a nut 'for locking 'saidplug'in'place. The plug D has a base portion cl and a conical ortapermglproject-ion or extension (2, preferably ending in a squared end11*, by which plug may be engaged by' a wrench. The base portion (Zisnlso preferably provided with threads d on its periphery by which itmay engage threadsa' upon the interior of the end of the casing A. .Thelower face of the plug-may be recessed, as indicated at and trued sothat it may fit tightly against the part which it engages, such as thecap on the upper face of the valve and prevent escape of motive-fluid.The plug thus not only acts as a closure for the end of the casing butalso serves to hold the interior parts in place. -Theplug has a passage(l lon itudinally the'rethrough, for admission of air to the tool, andis formed with interior screw-threads by which the end of a supply pipeis connected' Nut E is of cylindrical form and has a tapered bore atherein of approximately the same size as the tapered-extension (Z ofthe plug D upon which extension th'nutis adapted to fit.

the-

box

gaging the threads a of the casing. -The nut is also preferably split,as at e, and is preferably. provided with squared faces 0 whereby it maybe engaged by, a wrench.

The plug D is first inserted in the end of the casing'in contact withthe cap on the valve-box, or other part against which it bears. The nutE is then placed over the plug and screwed down upon the plug. As thenut is'screweddown upon the plug it is expanded by the tapered extensionthereof and its threads are thus wedged or expanded tightly intoengagement with the thread on =the casing. The .plug is thus held seuponsaid eap..

rarely in position by the nut and the nuterably provided withscrew-threads may be asmuch astheforce of vibration will only "COB saidcap upon said pzirt' bywvhiclnit is supported and interacting meansfuponsaid nut is pressed upon said cap.

a ut b gaged by said tapered extension, both said comprising a threadedcap and a threaded firmly pressedby the plug into engagein n p withthe'casmg. T he'plug being also .pirc

thus additionally secured in position: The elosure vvillynot be loosenedby vibration, in-

and cap for expanding said nut when said nut is pressed upon said cap 2.An end closure for pneumatictools, comprising a cap and an expansiblenut, said cap being adapted to rest upon and be firmly supported by apart of a. pneumatic tpol, and said nut'being adapted to press saidcap'uponsaid part-byivhich it is suppiorted, said 'cap' having a taperedpart adapted to expand said nut when said nut An end closure forpneumatic'tools, eomprising'a cap and a split nut, said cap beingadapted to rest upon and be firmly supported by apart of a pneumatictool, and said nut being adapted to presssaid cap upon said partbyzw'hic'h it is supported, said cap having ataperedfpart adapted toexpand said jnut 'v'\ hen said nut is pressed 4. An! "end? 010:, i forpneumatic tools, comprising a 'c-ap and a split nut having a taperedopening 'th'erein, said cap being adapted to rest upon and be firmlysupyldted by a part ofa pneumatic tool, said eing adapted to press saidcap upon said part by which it is supported, and said cap havinga-tapered extension adapted to fit said tapered opening in said 'nut andexpand said nut when said nut is pressed upon said cap.

5,, In a pneumatic tool, a body, and an end closure comprising a caphaving a' 'tapered extension and a split hreaded nutencap and nutengaging 'said body, whereby shocks imparted to said tapered extensiondrive said nut into binding engagement with said body.

Spr in end. closure for pneumatic tools,

expa'ns ible' nut, said cap being adaptedvto,

.d't W'n lfirnil pneumatic tool, an-dsai tog-maintain, said jcapnagementwith saidtool partand-interacting means upgn on a part of a said nutand'cap for expanding said" nut when said nut'is pressed upon said cap.

r. An end closure for pneumatic tools,

comprising a threaded capand a threaded expansible nut, said capfib ng'adapted to be screwed down firmly IIPQli'f-ft part of a pneumatic-tool,and said nut being adapted to maintain said cap in "engagement withbeing adapted,

said tool pant-said cap having atapered partadapte'd'to expand said'nutwhen said nut is pressed upon said cap.

8; An end closure for pneumatic' tools,

comprising athreaded'fianged cap, and a threaded expansible nut, saidcap being adapted to be screwed down firmly upon a part of a pneumatictool,- and said nut being adapted to maintain said cap in engagementwith said tool part, said cap having a tapered part adapted to expandsaidnut when said nut is pressed upon said cap. 7

9. In a pneumatic tool, body hav ing' an interiorly threaded opening inits end, art-endclosure comprising a'cap, adapted to close the end ofsaid bodv, having a screw-threaded flanged portion and, a smooth taperedportion, the taper being toward the upper portion of said cap, and asplit externally threaded nut having a smooth correspondingly taperedopening therethrough fitting over said tapered portion of said cap, andadapted to be forced into binding engagement- With the threads on apneumatic tool body b v the interengagement of "its tapered opening withthe tapered portion of said cap.

10. In a pneumatic tool, a body having an int'eriorlythreaded opening inits end, an

end closure comprising a cap, adapted to close the end of'saidbod vhaving a screwthrcaded portion and a tapered portion, and a splitthreaded nut having a tapered opening tlYeret-hrough fitting over saidtapered portion of saidcap, and adapted to beforced into bindingengagement with the threads on a pneumatic tool body by theinterengagement of its tapered opening with the tapered portion of said'31};-

11; In a' pneumatic tool,-the combination of a casing having a chambertherein, a valve mechanism contained trom'vthe oasing,fa valve-proper;movable Within said boxing, and a cap, anda closure adapted to engagethe end of said cas ing and retain said valve place Within the casing.

12. In. a pneumatic tool, the combination .of-a casing having achambertherein, a Valve mechanism contained within said mechanism inWithin. said chamber comprising a boxing separable chamber, a closurehaving a tapered shank and an inlet theretln'ough adapted to fit withinthe, casing above said valve, mechanism, and an expansible nutadapted tofit bupon said tapered shank for locking said closure in plaice.

I In Witness whereof, we have hereunto signed our names in the. presenceof two suhserilnng \YllllOfiSOh'.

HENRY E. TJE (lrENDRE. GEORGE ljElCll. "itntsses VVALTER TIIUMA, J osnruB. MQCANN.

